Abhi’s birthday falls on 17th April. In 2001 he celebrated it on a Tuesday. On which day of the week will he celebrate his birthday in 2015?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Friday
A date moves one day forward in the week after an ordinary year (365 days = 52 weeks + 1 odd day) and two days forward when the year passed contains a 29th February (366 days = 52 weeks + 2 odd days).
From 17 April 2001 to 17 April 2015 there are 14 years
29th February comes in between in 2004, 2008 and 2012, so 3 of these years have 366 days
Odd days \(=14\times1+3\times1=17\)
\(17=2\times7+3\), so the day moves 3 places forward
Tuesday + 3 days = Friday